I had story books as a kid that I liked but the one that really got me into reading was The Last of the Really Great Wangdoodles by Julie Edwards aka Andrews.
Then the one that really hooked me was Eight Cousins by Louisa May Alcott.
I didn't really read until very early teens. I've been an avid reader ever since. Love to read.
edit to add: Magazines, Tiger Beat, Teen Beat etc.